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<div class="title">swgenerator.cpp</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">  Copyright (c) 2019-2020 Fabrizio Di Vittorio.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">  All rights reserved.</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">  This file is part of FabGL Library.</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">  it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">  (at your option) any later version.</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">  GNU General Public License for more details.</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">  You should have received a copy of the GNU General Public License</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;alloca.h&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;freertos/FreeRTOS.h&quot;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#include &quot;freertos/task.h&quot;</span></div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &quot;soc/i2s_struct.h&quot;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &quot;soc/i2s_reg.h&quot;</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#include &quot;driver/periph_ctrl.h&quot;</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#include &quot;rom/lldesc.h&quot;</span></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &quot;soc/rtc.h&quot;</span></div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="fabutils_8h.html">fabutils.h</a>&quot;</span></div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="swgenerator_8h.html">swgenerator.h</a>&quot;</span></div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacefabgl.html">fabgl</a> {</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">/*************************************************************************************/</span></div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment">/* GPIOStream definitions */</span></div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="keywordtype">void</span> GPIOStream::begin()</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;{</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;  m_DMAStarted = <span class="keyword">false</span>;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;  m_DMABuffer  = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;  m_DMAData    = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;}</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="keywordtype">void</span> GPIOStream::begin(<span class="keywordtype">bool</span> div1_onGPIO0, gpio_num_t div2, gpio_num_t div4, gpio_num_t div8, gpio_num_t div16, gpio_num_t div32, gpio_num_t div64, gpio_num_t div128, gpio_num_t div256)</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;{</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;  m_DMAStarted = <span class="keyword">false</span>;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;  <span class="keywordflow">if</span> (div1_onGPIO0)</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    setupGPIO(GPIO_NUM_0,  -1, GPIO_MODE_OUTPUT); <span class="comment">// note: GPIO_NUM_0 cannot be changed!</span></div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;  setupGPIO(div2,   0, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;  setupGPIO(div4,   1, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;  setupGPIO(div8,   2, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;  setupGPIO(div16,  3, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;  setupGPIO(div32,  4, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  setupGPIO(div64,  5, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;  setupGPIO(div128, 6, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  setupGPIO(div256, 7, GPIO_MODE_OUTPUT);</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  m_DMAData = (<span class="keyword">volatile</span> uint8_t *) heap_caps_malloc(256, MALLOC_CAP_DMA);</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 256; ++i)</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    m_DMAData[i] = i;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  m_DMABuffer = (<span class="keyword">volatile</span> lldesc_t *) heap_caps_malloc(<span class="keyword">sizeof</span>(lldesc_t), MALLOC_CAP_DMA);</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;  m_DMABuffer-&gt;eof    = 0;</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;  m_DMABuffer-&gt;sosf   = 0;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;  m_DMABuffer-&gt;owner  = 1;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  m_DMABuffer-&gt;qe.stqe_next = (lldesc_t *) m_DMABuffer;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;  m_DMABuffer-&gt;offset = 0;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;  m_DMABuffer-&gt;size   = 256;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  m_DMABuffer-&gt;length = 256;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;  m_DMABuffer-&gt;buf    = (uint8_t*) m_DMAData;</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;}</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="keywordtype">void</span> GPIOStream::end()</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;{</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;  stop();</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;}</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="comment">// if bit is -1 = clock signal</span></div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;<span class="comment">// gpio = GPIO_UNUSED means not set</span></div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="keywordtype">void</span> GPIOStream::setupGPIO(gpio_num_t gpio, <span class="keywordtype">int</span> bit, gpio_mode_t mode)</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;{</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;  <span class="keywordflow">if</span> (gpio != GPIO_UNUSED) {</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="keywordflow">if</span> (bit == -1) {</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;      <span class="comment">// I2S1 clock out to CLK_OUT1 (fixed to GPIO0)</span></div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      WRITE_PERI_REG(PIN_CTRL, 0xF);</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;      PIN_FUNC_SELECT(GPIO_PIN_REG_0, FUNC_GPIO0_CLK_OUT1);</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;      configureGPIO(gpio, mode);</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;      gpio_matrix_out(gpio, I2S1O_DATA_OUT0_IDX + bit, <span class="keyword">false</span>, <span class="keyword">false</span>);</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    }</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    </div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;  }</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;}</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="keywordtype">void</span> GPIOStream::play(<span class="keywordtype">int</span> freq, lldesc_t <span class="keyword">volatile</span> * dmaBuffers)</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;{</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;  <span class="keywordflow">if</span> (!m_DMAStarted) {</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="comment">// Power on device</span></div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    periph_module_enable(PERIPH_I2S1_MODULE);</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    <span class="comment">// Initialize I2S device</span></div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    I2S1.conf.tx_reset = 1;</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    I2S1.conf.tx_reset = 0;</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="comment">// Reset DMA</span></div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    I2S1.lc_conf.out_rst = 1;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    I2S1.lc_conf.out_rst = 0;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="comment">// Reset FIFO</span></div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    I2S1.conf.tx_fifo_reset = 1;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    I2S1.conf.tx_fifo_reset = 0;</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    <span class="comment">// LCD mode</span></div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    I2S1.conf2.val            = 0;</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    I2S1.conf2.lcd_en         = 1;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    I2S1.conf2.lcd_tx_wrx2_en = 1;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    I2S1.conf2.lcd_tx_sdx2_en = 0;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    I2S1.sample_rate_conf.val         = 0;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    I2S1.sample_rate_conf.tx_bits_mod = 8;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    setupClock(freq);</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    I2S1.fifo_conf.val                  = 0;</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    I2S1.fifo_conf.tx_fifo_mod_force_en = 1;</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;    I2S1.fifo_conf.tx_fifo_mod          = 1;</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    I2S1.fifo_conf.tx_fifo_mod          = 1;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    I2S1.fifo_conf.tx_data_num          = 32;</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    I2S1.fifo_conf.dscr_en              = 1;</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    I2S1.conf1.val           = 0;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    I2S1.conf1.tx_stop_en    = 0;</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    I2S1.conf1.tx_pcm_bypass = 1;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    I2S1.conf_chan.val         = 0;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    I2S1.conf_chan.tx_chan_mod = 1;</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    I2S1.conf.tx_right_first = 1;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    I2S1.timing.val = 0;</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    <span class="comment">// Reset AHB interface of DMA</span></div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    I2S1.lc_conf.ahbm_rst      = 1;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    I2S1.lc_conf.ahbm_fifo_rst = 1;</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    I2S1.lc_conf.ahbm_rst      = 0;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    I2S1.lc_conf.ahbm_fifo_rst = 0;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="comment">// Start DMA</span></div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    I2S1.lc_conf.val    = I2S_OUT_DATA_BURST_EN | I2S_OUTDSCR_BURST_EN;</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    I2S1.out_link.addr  = (uint32_t) (dmaBuffers ? &amp;dmaBuffers[0] : m_DMABuffer);</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    I2S1.out_link.start = 1;</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    I2S1.conf.tx_start  = 1;</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    m_DMAStarted = <span class="keyword">true</span>;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;  }</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;}</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="keywordtype">void</span> GPIOStream::stop()</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;{</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;  <span class="keywordflow">if</span> (m_DMAStarted) {</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;    rtc_clk_apll_enable(<span class="keyword">false</span>, 0, 0, 0, 0);</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    periph_module_disable(PERIPH_I2S1_MODULE);</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    m_DMAStarted = <span class="keyword">false</span>;</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;  }</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;}</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="keyword">struct </span>APLLParams {</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;  uint8_t sdm0;</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;  uint8_t sdm1;</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;  uint8_t sdm2;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;  uint8_t o_div;</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;};</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;<span class="comment">// Must be:</span></div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="comment">//   maxDen &gt; 1</span></div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;<span class="comment">//   value &gt;= 0</span></div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;<span class="preprocessor">#if FABGLIB_USE_APLL_AB_COEF</span></div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;<span class="keywordtype">void</span> floatToFraction(<span class="keywordtype">double</span> value, <span class="keywordtype">int</span> maxDen, <span class="keywordtype">int</span> * num, <span class="keywordtype">int</span> * den)</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;{</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;  int64_t a, h[3] = { 0, 1, 0 }, k[3] = { 1, 0, 0 };</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;  int64_t x, d, n = 1;</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;  <span class="keywordflow">while</span> (value != floor(value)) {</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    n &lt;&lt;= 1;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    value *= 2;</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;  }</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;  d = value;</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 64; ++i) {</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    a = n ? d / n : 0;</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;    <span class="keywordflow">if</span> (i &amp;&amp; !a)</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;      <span class="keywordflow">break</span>;</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;    x = d;</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;    d = n;</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;    n = x % n;</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;    x = a;</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;    <span class="keywordflow">if</span> (k[1] * a + k[0] &gt;= maxDen) {</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;      x = (maxDen - k[0]) / k[1];</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;      <span class="keywordflow">if</span> (x * 2 &gt;= a || k[1] &gt;= maxDen)</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        i = 65;</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;      <span class="keywordflow">else</span></div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        <span class="keywordflow">break</span>;</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;    }</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;    h[2] = x * h[1] + h[0];</div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;    h[0] = h[1];</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;    h[1] = h[2];</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;    k[2] = x * k[1] + k[0];</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;    k[0] = k[1];</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;    k[1] = k[2];</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;  }</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;  *den = k[1];</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;  *num = h[1];</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;}</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;<span class="comment">// definitions:</span></div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;<span class="comment">//   apll_clk = XTAL * (4 + sdm2 + sdm1 / 256 + sdm0 / 65536) / (2 * o_div + 4)</span></div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;<span class="comment">//     dividend = XTAL * (4 + sdm2 + sdm1 / 256 + sdm0 / 65536)</span></div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;<span class="comment">//     divisor  = (2 * o_div + 4)</span></div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;<span class="comment">//   freq = apll_clk / (2 + b / a)        =&gt; assumes  tx_bck_div_num = 1 and clkm_div_num = 2</span></div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;<span class="comment">// Other values range:</span></div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;<span class="comment">//   sdm0  0..255</span></div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;<span class="comment">//   sdm1  0..255</span></div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;<span class="comment">//   sdm2  0..63</span></div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;<span class="comment">//   o_div 0..31</span></div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;<span class="comment">// Assume xtal = FABGLIB_XTAL (40MHz)</span></div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;<span class="comment">// The dividend should be in the range of 350 - 500 MHz (350000000-500000000), so these are the</span></div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;<span class="comment">// actual parameters ranges (so the minimum apll_clk is 5303030 Hz and maximum is 125000000Hz):</span></div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;<span class="comment">//  MIN 87500000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 0</span></div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;<span class="comment">//  MAX 125000000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 0</span></div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;<span class="comment">//  MIN 58333333Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 1</span></div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;<span class="comment">//  MAX 83333333Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 1</span></div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;<span class="comment">//  MIN 43750000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 2</span></div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;<span class="comment">//  MAX 62500000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 2</span></div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;<span class="comment">//  MIN 35000000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 3</span></div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;<span class="comment">//  MAX 50000000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 3</span></div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;<span class="comment">//  MIN 29166666Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 4</span></div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;<span class="comment">//  MAX 41666666Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 4</span></div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;<span class="comment">//  MIN 25000000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 5</span></div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;<span class="comment">//  MAX 35714285Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 5</span></div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;<span class="comment">//  MIN 21875000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 6</span></div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;<span class="comment">//  MAX 31250000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 6</span></div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;<span class="comment">//  MIN 19444444Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 7</span></div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;<span class="comment">//  MAX 27777777Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 7</span></div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;<span class="comment">//  MIN 17500000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 8</span></div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;<span class="comment">//  MAX 25000000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 8</span></div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;<span class="comment">//  MIN 15909090Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 9</span></div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;<span class="comment">//  MAX 22727272Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 9</span></div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;<span class="comment">//  MIN 14583333Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 10</span></div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;<span class="comment">//  MAX 20833333Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 10</span></div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;<span class="comment">//  MIN 13461538Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 11</span></div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;<span class="comment">//  MAX 19230769Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 11</span></div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;<span class="comment">//  MIN 12500000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 12</span></div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;<span class="comment">//  MAX 17857142Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 12</span></div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;<span class="comment">//  MIN 11666666Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 13</span></div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;<span class="comment">//  MAX 16666666Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 13</span></div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;<span class="comment">//  MIN 10937500Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 14</span></div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;<span class="comment">//  MAX 15625000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 14</span></div><div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;<span class="comment">//  MIN 10294117Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 15</span></div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;<span class="comment">//  MAX 14705882Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 15</span></div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;<span class="comment">//  MIN 9722222Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 16</span></div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;<span class="comment">//  MAX 13888888Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 16</span></div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;<span class="comment">//  MIN 9210526Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 17</span></div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;<span class="comment">//  MAX 13157894Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 17</span></div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;<span class="comment">//  MIN 8750000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 18</span></div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;<span class="comment">//  MAX 12500000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 18</span></div><div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;<span class="comment">//  MIN 8333333Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 19</span></div><div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="comment">//  MAX 11904761Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 19</span></div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;<span class="comment">//  MIN 7954545Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 20</span></div><div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;<span class="comment">//  MAX 11363636Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 20</span></div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;<span class="comment">//  MIN 7608695Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 21</span></div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;<span class="comment">//  MAX 10869565Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 21</span></div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;<span class="comment">//  MIN 7291666Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 22</span></div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;<span class="comment">//  MAX 10416666Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 22</span></div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;<span class="comment">//  MIN 7000000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 23</span></div><div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;<span class="comment">//  MAX 10000000Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 23</span></div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;<span class="comment">//  MIN 6730769Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 24</span></div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;<span class="comment">//  MAX 9615384Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 24</span></div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;<span class="comment">//  MIN 6481481Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 25</span></div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;<span class="comment">//  MAX 9259259Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 25</span></div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;<span class="comment">//  MIN 6250000Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 26</span></div><div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;<span class="comment">//  MAX 8928571Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 26</span></div><div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;<span class="comment">//  MIN 6034482Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 27</span></div><div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;<span class="comment">//  MAX 8620689Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 27</span></div><div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="comment">//  MIN 5833333Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 28</span></div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;<span class="comment">//  MAX 8333333Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 28</span></div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;<span class="comment">//  MIN 5645161Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 29</span></div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;<span class="comment">//  MAX 8064516Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 29</span></div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;<span class="comment">//  MIN 5468750Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 30</span></div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;<span class="comment">//  MAX 7812500Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 30</span></div><div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;<span class="comment">//  MIN 5303030Hz - sdm0 = 0 sdm1 = 192 sdm2 = 4 o_div = 31</span></div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;<span class="comment">//  MAX 7575757Hz - sdm0 = 0 sdm1 = 128 sdm2 = 8 o_div = 31</span></div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> APLLCalcParams(<span class="keywordtype">double</span> freq, APLLParams * params, uint8_t * a, uint8_t * b, <span class="keywordtype">double</span> * out_freq, <span class="keywordtype">double</span> * error)</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;{</div><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;  <span class="keywordtype">double</span> FXTAL = FABGLIB_XTAL;</div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;</div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;  *error = 999999999;</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;  <span class="keywordtype">double</span> apll_freq = freq * 2;</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;</div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> o_div = 0; o_div &lt;= 31; ++o_div) {</div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;    <span class="keywordtype">int</span> idivisor = (2 * o_div + 4);</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> sdm2 = 4; sdm2 &lt;= 8; ++sdm2) {</div><div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;      <span class="comment">// from tables above</span></div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;      <span class="keywordtype">int</span> minSDM1 = (sdm2 == 4 ? 192 : 0);</div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;      <span class="keywordtype">int</span> maxSDM1 = (sdm2 == 8 ? 128 : 255);</div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;      <span class="comment">// apll_freq = XTAL * (4 + sdm2 + sdm1 / 256) / divisor   -&gt;   sdm1 = (apll_freq * divisor - XTAL * 4 - XTAL * sdm2) * 256 / XTAL</span></div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;      <span class="keywordtype">int</span> startSDM1 = ((apll_freq * idivisor - FXTAL * 4.0 - FXTAL * sdm2) * 256.0 / FXTAL);</div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;<span class="preprocessor">#if FABGLIB_USE_APLL_AB_COEF</span></div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;      <span class="keywordflow">for</span> (<span class="keywordtype">int</span> isdm1 = tmax(minSDM1, startSDM1); isdm1 &lt;= maxSDM1; ++isdm1) {</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;<span class="preprocessor">#else</span></div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;      <span class="keywordtype">int</span> isdm1 = startSDM1; {</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;        <span class="keywordtype">int</span> sdm1 = isdm1;</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;        sdm1 = tmax(minSDM1, sdm1);</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;        sdm1 = tmin(maxSDM1, sdm1);</div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;</div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;        <span class="comment">// apll_freq = XTAL * (4 + sdm2 + sdm1 / 256 + sdm0 / 65536) / divisor   -&gt;   sdm0 = (apll_freq * divisor - XTAL * 4 - XTAL * sdm2 - XTAL * sdm1 / 256) * 65536 / XTAL</span></div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;        <span class="keywordtype">int</span> sdm0 = ((apll_freq * idivisor - FXTAL * 4.0 - FXTAL * sdm2 - FXTAL * sdm1 / 256.0) * 65536.0 / FXTAL);</div><div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;        <span class="comment">// from tables above</span></div><div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;        sdm0 = (sdm2 == 8 &amp;&amp; sdm1 == 128 ? 0 : tmin(255, sdm0));</div><div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;        sdm0 = tmax(0, sdm0);</div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;</div><div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;        <span class="comment">// dividend inside 350-500Mhz?</span></div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;        <span class="keywordtype">double</span> dividend = FXTAL * (4.0 + sdm2 + sdm1 / 256.0 + sdm0 / 65536.0);</div><div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;        <span class="keywordflow">if</span> (dividend &gt;= 350000000 &amp;&amp; dividend &lt;= 500000000) {</div><div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;          <span class="comment">// adjust output frequency using &quot;b/a&quot;</span></div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;          <span class="keywordtype">double</span> oapll_freq = dividend / idivisor;</div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;</div><div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;          <span class="comment">// Calculates &quot;b/a&quot;, assuming tx_bck_div_num = 1 and clkm_div_num = 2:</span></div><div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;          <span class="comment">//   freq = apll_clk / (2 + clkm_div_b / clkm_div_a)</span></div><div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;          <span class="comment">//     abr = clkm_div_b / clkm_div_a</span></div><div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;          <span class="comment">//     freq = apll_clk / (2 + abr)    =&gt;    abr = apll_clk / freq - 2</span></div><div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;          uint8_t oa = 1, ob = 0;</div><div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;<span class="preprocessor">#if FABGLIB_USE_APLL_AB_COEF</span></div><div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;          <span class="keywordtype">double</span> abr = oapll_freq / freq - 2.0;</div><div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;          <span class="keywordflow">if</span> (abr &gt; 0 &amp;&amp; abr &lt; 1) {</div><div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;            <span class="keywordtype">int</span> num, den;</div><div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;            floatToFraction(abr, 63, &amp;num, &amp;den);</div><div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;            ob = tclamp(num, 0, 63);</div><div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;            oa = tclamp(den, 0, 63);</div><div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;          }</div><div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;</div><div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;          <span class="comment">// is this the best?</span></div><div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;          <span class="keywordtype">double</span> ofreq = oapll_freq / (2.0 + (double)ob / oa);</div><div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;          <span class="keywordtype">double</span> err = freq - ofreq;</div><div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;          <span class="keywordflow">if</span> (abs(err) &lt; abs(*error)) {</div><div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;            *params = (APLLParams){(uint8_t)sdm0, (uint8_t)sdm1, (uint8_t)sdm2, (uint8_t)o_div};</div><div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;            *a = oa;</div><div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;            *b = ob;</div><div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;            *out_freq = ofreq;</div><div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;            *error = err;</div><div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;            <span class="keywordflow">if</span> (err == 0.0)</div><div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;              <span class="keywordflow">return</span>;</div><div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;          }</div><div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;        }</div><div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;      }</div><div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;</div><div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;    }</div><div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;  }</div><div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;}</div><div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;</div><div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;</div><div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;<span class="keywordtype">void</span> GPIOStream::setupClock(<span class="keywordtype">int</span> freq)</div><div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;{</div><div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;  APLLParams p = {0, 0, 0, 0};</div><div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;  <span class="keywordtype">double</span> error, out_freq;</div><div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;  uint8_t a = 1, b = 0;</div><div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;  APLLCalcParams(freq, &amp;p, &amp;a, &amp;b, &amp;out_freq, &amp;error);</div><div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;</div><div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;  I2S1.clkm_conf.val          = 0;</div><div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;  I2S1.clkm_conf.clkm_div_b   = b;</div><div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;  I2S1.clkm_conf.clkm_div_a   = a;</div><div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;  I2S1.clkm_conf.clkm_div_num = 2;  <span class="comment">// not less than 2</span></div><div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;  </div><div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;  I2S1.sample_rate_conf.tx_bck_div_num = 1; <span class="comment">// this makes I2S1O_BCK = I2S1_CLK</span></div><div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;</div><div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;  rtc_clk_apll_enable(<span class="keyword">true</span>, p.sdm0, p.sdm1, p.sdm2, p.o_div);</div><div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;</div><div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;  I2S1.clkm_conf.clka_en = 1;</div><div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;}</div><div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;</div><div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;</div><div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;</div><div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;</div><div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;</div><div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;</div><div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;} <span class="comment">// end of namespace</span></div><div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;</div><div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;</div><div class="ttc" id="swgenerator_8h_html"><div class="ttname"><a href="swgenerator_8h.html">swgenerator.h</a></div><div class="ttdoc">This file contains fabgl::GPIOStream definition. </div></div>
<div class="ttc" id="fabutils_8h_html"><div class="ttname"><a href="fabutils_8h.html">fabutils.h</a></div><div class="ttdoc">This file contains some utility classes and functions. </div></div>
<div class="ttc" id="namespacefabgl_html"><div class="ttname"><a href="namespacefabgl.html">fabgl</a></div><div class="ttdef"><b>Definition:</b> <a href="canvas_8cpp_source.html#l00031">canvas.cpp:31</a></div></div>
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